Stratigraphic measuring instrument



Filed March 20, 1924 T REINHOLD STRATIGRAPHIC MEASURING INSTRUMENT MI Z ,a

Feb. 7, 1928.

Patented Feb. 7, 1928.

` UNITED STATES i 41,653,537 PATENT oFFicE.

THOMAS REINI-IOLD, .OF HAARLEM, NETHERLANDS.

sran'rrenernrc MEASURING INSTRUMENT.

/ Application filed March 20, 1924, Serial No. 700,729, andin the Netherlands March 29, 1988.

The object of the present invention is to provide' a photographic .measuring instrument` for ascertaining the direction of the bend or inclination of stone, rock or gneiss in drilled bore holesfor the purpose of obtaining the required data concerning the course of the strata. With the hitherto known instruments it was impossible to obtain exact information as to the course of the strata.

With this end in View a certain length of the bore hole is, according to the invention, tirstclosed in a watertightmanner at the upper and lower ends by means of the instrument. This separated length or portion of the bore hole is then washed or cleaned with pure water so that the photographic apparatus contained within the instrument is surrounded by clear and clean water. A photographic view is then taken of a part of the wall of the bore holeby the aid of electric illumination, and at the same time the direction of the compass needle of a magnetic or gyroscopic compass contained withl in the instrument is taken upon the same photographic plate.

By taking a series of photographs in various directions. the bend or inclination of the stratum of the drilled stone. rock or gneiss may be ascertained, and by taking simultaneously lthe corresponding' directions or positions of the compass card during the various takings of the bore hole wall the direction of the bend or inclination of the strata may be determined.

One construction of the stratigraphic instrument embodying the features of the invention is shown by way of example in the accompanying Idrawing in which Fig. 1 is a longitudinal section of the instrument and the bore hole, Fig. 2 a cross section on line 2-2 of Fig. 1, Fig. '3 a longitudinal section through a modified construction employing a horizontal closure device and Fig. 4 -a longitudinal section illustrating a diii'erent arrangement ot the electric lamps.

The stratigraphic instrument forming the subject of the invention comprises a tubular casing 1 having a bottom 2 and adapted to be closed at the top end by means of a screw closure 3. Above the closure 3 and below the bottom 2 are provided cylindrical chambers 4 and 5 for the reception of pressure producing means. Piston rods 6 and 7 are adapted to move up and down through the covers or heads of the chambers 4 and 5 said piston rods 6 and 7 being adapted to exert pressure upon rubber packin rings 8 and 9 respectively which rest wit their upper surfaces against stationary plates 10 and 11 respectively. The upper rod 6 is guided in acylindrical easing 12 and serves also for the admission'of water, a water passage 13 being provided in the rod 6 which opens below the packing ring 8 and communicates with the annular space between the tubular casing 1 and the internal wall of the bore hole 14. Below the screw closure 3 and wit-hin the cylindrical chamber 22 of the -casing is provided a photographic apparatus 15 the lens 19 of which is downwardly directed.

In the wall of the tubular casing 1 there is provided an opening closed in a watertight manner by a small transparent disc 16. An inclined mirror 17 is placed in the space 22 behind the disc 16. A magnetic or gvro scopic compass 18 is placed upon the bottom 2 ot the casing 1. This compass is partly covered as regards the rays coming from the photographic apparatus by the mirror 174.

The disc 16 which in the construction shown is arranged in the vertical wall of the tubular casing 1 and closes hermetically the cylindrical space 22 against the bore hole 14, mav as shown in Fig. 3 be arranged horizontally immediately below the lens 19 oi the photographic apparatus. It will be seen that in Fig. 3 the disc 16 through which the rays pass may be very small and thus withstand very high pressures. In the construction of Fig. 3 the space 22 below the disc 16 is filled with water. The disc 16 arranged in the vertical wall of the\tubular casing 1 is not' intended to eiiect a. watertight closure and is therefore not subjected to high pressure. It may be made very thin and serves only for preventing the entrance of dirty water into the space 22. The water round the mirror 17 should be clear as otherwise it would detrimentally affect the action of the apparatus. y

In the construction shown in Fig. 1 the wall of the bore hole is illuminated by electric incandescent lamps arranged inside the casing 1 laterally of the mirror 17V.\It is preferred. however, to arrange the source of light in the manner shown in Fig. 4. A ccording to Fig. 4 the electric lamps 24 or othersources ot light for illuminating the wall of the bore hole to be photographed` throw the light through the vwatertight ltd lill) dill titl

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transparent closing discs 23. The reflected rays pass through -the watertight closing disc 16 to the lens 19. In this manner detrimental reiiection is avoided and the photographie views are much sharper than' in the case in which both the direct and the reflected rays have to pass through the same disc 16. If electric lam s of a particular construction are used tile discs 23 may be entirely dispensed with. In the construction shown in Fig. 4 the compass is illuminated by a separate lamp 25. A

In the construction according to Fig. 3 in which the transparent closing disc 1(3 is arranged directly below the lens 19, the electrie lamps are arranged between the lens 19 and the disc 16.

The mirror 17 is provided at its upper edge with a cut-out portion 20 (sec Fig. 2) through which the rays can pass from above to thecompass card 2li.

The operation is as lollows:

The instrument is lowered within the bore hole le to the required depth at which the direction and inclination ot' the various strata of the rock are to he ascertained. The means contained in the chambers l and 5 for producing pressure are then brought into action whereby the rods (i and 7 are caused to compress the rubber packing rings 8 and 9. If desired the rings might be eonipressed by pressure water taken from the pipe which supplies the scavenging water during the drilling operation. The rings El and 9 are expanded by the pressure and are caused to lie tightly against the bore hole whereby the length of the bore hole 1l between the rings 8 and 9 is practicallyr separated from the remaining length ot the bore hole. After the length of the bore hole within which the photographic View is to be. taken has thus been separated, clean scatena* ing or wash water is admitted by way of the passage 13, and the bore hole section 1liround the instrument is cleaned, the. water escaping;l through a passage 21 provided in the ring 8 and the disc 10. l'Vhen the water in the space 14 is sufficiently clean and clear so as not to impede the photographic oneration` the electric lamps are switched in and the apparatus 15 is brought into action. In this manner a photographic view of the part of the bore hole wall visible through disks 16 or 16 is taken by the aid ot' the mirror 17. At the same time a part of the compass card visible `through the ent-out portion 20 is taken upon the same plate. It will thus be seen that a View of a part of the bore hole is taken'and at the same time a photographic record is made of the direc tion in which the view was taken. The photographic View gives the inclination of the various strata of the drilled rock, whilst the position of the compass card indicates the direction in which the strata extend.

If a series of such views is taken at definite angular positions of the instrument, exact information may be obtained as regards stratification ol the rock, the inclination of the strata and the directions in which the strata runs.

I claim:

l. An instrument arranged to be lowered into a bore hole, comprising a camera for photographing a portion of the wall of the bore hole at the level to which the instrument is lowered, and means l'or indicating on the photograph the geographical direction `from the center el the bore ot the surface photographed.

2. A stratigraphic measuring instrument, eomprisiim1 a closed tubular lusing' adapted to be inserted into a bore hole. a photo` graphic camera arranged within said casing, an inclined mirror arranged within said casing' for reflectingl an image ol a portion of a bore hole wall into the camera, a compass within said casinglr below the mirror ar-A ranged in such a manner as to be capable of throwing an image of said compass into the camera, and means `tor illuminating the wall ot the bore hole opposite the mirror and the compass.

3. A stratigraphic measuring instrnmciu. comprising a closed tubular casing adapted to be inserted into a bore hole. a photo- `graphic camera arranged within said casing, an inclined mirror arranged within said was ing' and adapted to reflect nuages from the wall of said borehole to said eamerzu a transparentdisc fitted into the wall ot the casing in 'front of said, mirror, a compass below the mirror in the range oi'k the camera. and an electric lamp arranged within said cai:- ing' laterally olt the disc and adapted to it laminate the wall of the bore hole situated opposite the disc as well as the Compass.

ai. t stratigraphic measuring inst-rumeni. comprisingr a closed tubular casing adapted to be inserted into a bore hole, a photolgraphic camera arranged within said casing. an inclined mirror arranged within said casing in the range ot the camera and haw ing a cutaway portion. a transparent disc arranged in the wall ol the tubular casing in front of said mirror, a compass in the casing below the camera and exposed thereto through the cutaway portion of the mirror. and means for illuminatingr the portion of the wall of the bore hole in front of the disc as well as the compass, substantially a described.

In testimoni? whereof I have hereunto sul` my hand.

THOMAS REINHLD.

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